ASW Voice Procedures

Question 1

General ASW Voice Reports

Answer 1

• Lost contact
• Datum Report
• Riser/Sinker Report
• Search Attack Plans
• Attack Intentions

Question 2

Name the distance/range reporting?

Answer 2

• 5 miles or greater - report as Distance in Miles e.g. ‘Distance 6’ (6nm)
• Less than 5 miles - report as hundreds of yards e.g. ‘Range 35’ (3,500 yards)

Question 3

The rules of DATUM SOPs

Answer 3

1. DATUMS are removed when a unit gains contact (unless PWO wants it to remain on system)
2. DATUMS/contact retains same force track number when unit loses or gains contact
3. A contact in the TDZ is prosecuted despite classification

Question 4

What’s included in a DATUM report?

Answer 4

Datum number 
Position 
Datum error
Course and speed 
Time established

Question 5

When are Flash Reports used?

Answer 5

Standard = to get attention on a voice circuit

Break In = when you need to pass vital information is greater than current transmissions being made

Question 6

The different Racket Report Confidence Report Levels

Answer 6

Confidence 1 - Doubtful

Confidence 2 - Possible

Confidence 3 - Probable

Confidence 4 - Positive

Question 7

What’s involved in Subsurface Investigate/Chart Check?

Answer 7

1. Dipper gains contact controller inputs position into Command system, initiating subsurface investigation immediately.
2. Command Open Line - “All positions AC, Subsurface Investigate, bearing, range/distance”.
3. Once completed controller reports findings to the Dipper saying Chart positive or Chart negative.

Question 8

What is a Look/Watch report?

Answer 8

Localising an aircraft’s search for a submarine. Unit in contact passes position of contact relative to aircraft.

Question 9

Explain Plan Oaktree

Answer 9

Allows dipping aircraft to be formed up on ships in formation Yankee to allow sweep of an area utilising all sonars.

Question 10

Explain the “On Top” Procedures

Answer 10

If A/C needs to indicate position of anything visual it will utilise;

Radar On-Top

• Ship holds A/C on radar
• A/C overflies position calling NOW NOW NOW
• On third NOW A/C marks position

Reverse Radar On -Top

• Aircraft holds ship on radar, overflies position
• On third NOW A/C plots range and bearing of ship passing to controller
• Controller works out range and bearing to put into Command System.

Visual On-Top

• No radar available
• A/C flies over position and reports NOW NOW NOW
• On third NOW OOW plots visual bearing and estimated range.